Ultrasonic Studies on Molecular Interactions in Binary Mixtures of N-Methyl Aniline with Methyl Isobutylketone,+3-Pentanone, and plus Cycloalkanones at 303.15 K

Densities, rho, viscosities, eta, and ultrasonic sound velocities u of pure methyl isobutylketone, diethylketone, cyclopentanone, cyclohexanone, 2-methyl cyclohexanone and those of their binary mixtures with N-methyl aniline were measured at 303.15 K over the entire composition range. These experimental data have been used to calculate the excess volume (V-E), deviation in ultrasonic sound velocity (Delta u), isentropic compressibility (kappa(s)), intermolecular free length (L-f), excess intermolecular free length (L-f(E)), acoustic impedance (Z), excess isentropic compressibility (kappa(E)(S)), deviation in viscosity (Delta eta) and excess Gibbs energy of activation of viscous flow (G*(E)). The viscosity data have been correlated using three equations proposed by Grunberg and Nissan, Katti and Chaudhri, and Hind et al. The excess/deviations have been fitted by Redlich-Kister equation and the results are discussed in terms of molecular interactions present in these mixtures.